:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--accent: #3b82f6;--accent-hover: #2563eb;--success: #22c55e;--warning: #f59e0b;--error: #ef4444;--border: #334155;--radius: 12px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .3)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh}a{color:var(--accent);text-decoration:none}.app-layout{display:flex;min-height:100vh}.sidebar{width:260px;background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100}.sidebar-header{padding:24px 20px;border-bottom:1px solid var(--border)}.sidebar-header h1{font-size:18px;font-weight:700;background:linear-gradient(135deg,var(--accent),#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.sidebar-header p{font-size:11px;color:var(--text-muted);margin-top:4px}.sidebar-nav{padding:12px;flex:1;overflow-y:auto}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:8px;color:var(--text-secondary);font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;margin-bottom:4px;border:none;background:none;width:100%;text-align:left}.nav-item:hover{background:var(--bg-tertiary);color:var(--text-primary)}.nav-item.active{background:var(--accent);color:#fff}.sidebar-footer{padding:16px 12px;border-top:1px solid var(--border)}.sidebar-user{display:flex;align-items:center;gap:10px;padding:8px;border-radius:8px;font-size:13px}.sidebar-user img{width:32px;height:32px;border-radius:50%;object-fit:cover}.logout-btn{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:8px;background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:13px;width:100%;transition:all .2s;margin-top:8px}.logout-btn:hover{background:#ef44441a;color:var(--error)}.main-content{flex:1;margin-left:260px;padding:32px 48px;display:flex;flex-direction:column;align-items:center}.main-content>*{width:100%;max-width:1100px}.page-header{margin-bottom:28px}.page-header h2{font-size:24px;font-weight:700}.page-header p{color:var(--text-secondary);margin-top:4px;font-size:14px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:32px}.stat-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:all .2s;text-align:center}.stat-card:hover{border-color:var(--accent);transform:translateY(-2px)}.stat-label{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.stat-value{font-size:28px;font-weight:700;margin-top:8px}.stat-icon{font-size:20px;margin-bottom:8px}.table-container{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.table-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border)}.table-header h3{font-size:16px;font-weight:600}.table-search{padding:8px 14px;border-radius:8px;background:var(--bg-tertiary);border:1px solid var(--border);color:var(--text-primary);font-size:13px;outline:none;width:240px}.table-search:focus{border-color:var(--accent)}table{width:100%;border-collapse:collapse}th{text-align:left;padding:12px 20px;font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border)}td{padding:14px 20px;font-size:14px;border-bottom:1px solid var(--border)}tr:hover{background:#3b82f60d}.user-cell{display:flex;align-items:center;gap:12px}.user-avatar{width:36px;height:36px;border-radius:50%;background:var(--bg-tertiary);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;overflow:hidden}.user-avatar img{width:100%;height:100%;object-fit:cover}.user-name{font-weight:500}.user-email{font-size:12px;color:var(--text-muted)}.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:600}.badge-google{background:#3b82f626;color:var(--accent)}.badge-email{background:#8b5cf626;color:#8b5cf6}.card-list{display:flex;flex-direction:column;gap:12px}.card-item{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;transition:all .2s}.card-item:hover{border-color:var(--accent);transform:translate(4px)}.card-item-left{display:flex;align-items:center;gap:16px}.card-item-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700}.card-item-title{font-weight:600;font-size:15px}.card-item-sub{font-size:13px;color:var(--text-secondary);margin-top:2px}.card-item-right{color:var(--text-muted)}.btn{padding:10px 20px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:8px;border:none}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary)}.btn-secondary:hover{background:var(--border)}.btn-danger{background:#ef444426;color:var(--error)}.btn-danger:hover{background:#ef444440}.btn-sm{padding:6px 12px;font-size:12px}.modal-overlay{position:fixed;inset:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:200}.modal{background:var(--bg-secondary);border:1px solid var(--border);border-radius:16px;padding:28px;width:90%;max-width:600px;max-height:85vh;overflow-y:auto}.modal h3{font-size:18px;font-weight:700;margin-bottom:20px}.modal-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:24px}.form-group{margin-bottom:16px}.form-label{display:block;font-size:13px;font-weight:500;margin-bottom:6px;color:var(--text-secondary)}.form-input,.form-select,.form-textarea{width:100%;padding:10px 14px;border-radius:8px;background:var(--bg-tertiary);border:1px solid var(--border);color:var(--text-primary);font-size:14px;font-family:inherit;outline:none;transition:border-color .2s}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--accent)}.form-textarea{min-height:80px;resize:vertical}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0f172a,#1e1b4b)}.login-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:20px;padding:40px;width:90%;max-width:400px;text-align:center}.login-card h1{font-size:24px;font-weight:700;background:linear-gradient(135deg,var(--accent),#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:8px}.login-card p{color:var(--text-muted);font-size:14px;margin-bottom:28px}.google-btn{width:100%;padding:12px 20px;border-radius:10px;background:#fff;color:#333;font-size:15px;font-weight:600;cursor:pointer;border:none;display:flex;align-items:center;justify-content:center;gap:12px;transition:all .2s}.google-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.login-error{margin-top:16px;padding:10px;border-radius:8px;background:#ef44441a;color:var(--error);font-size:13px}.question-card{background:var(--bg-tertiary);border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:12px}.question-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.question-number{font-weight:600;color:var(--accent);font-size:13px}.question-type{font-size:11px;padding:3px 8px;border-radius:4px;background:#3b82f626;color:var(--accent)}.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}.empty-state span{font-size:48px;display:block;margin-bottom:16px}.loading{display:flex;align-items:center;justify-content:center;min-height:100vh;color:var(--text-muted);font-size:16px}.mobile-header,.sidebar-overlay{display:none}@media(max-width:768px){.mobile-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:var(--bg-secondary);border-bottom:1px solid var(--border);position:fixed;top:0;left:0;right:0;z-index:90}.mobile-header h1{font-size:16px;font-weight:700;background:linear-gradient(135deg,var(--accent),#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hamburger-btn{background:none;border:none;color:var(--text-primary);cursor:pointer;padding:6px;font-size:24px;line-height:1}.sidebar{transform:translate(-100%);transition:transform .3s ease;z-index:150;background:#1e293bd1;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-right:1px solid rgba(255,255,255,.08)}.sidebar.open{transform:translate(0)}.sidebar-overlay{display:none;position:fixed;inset:0;background:#00000059;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:140}.sidebar-overlay.open{display:block}.main-content{margin-left:0;padding:72px 16px 16px;max-width:100%}.page-header{margin-bottom:16px}.page-header h2{font-size:20px}.stats-grid{grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:20px}.stat-card{padding:14px}.stat-value{font-size:22px}.stat-icon{font-size:16px}.table-container{overflow-x:auto}.table-header{flex-direction:column;gap:10px;align-items:stretch}.table-search{width:100%}th,td{padding:10px 12px;font-size:13px;white-space:nowrap}.card-item{padding:12px 14px}.card-item-left{gap:12px}.card-item-icon{width:38px;height:38px;font-size:14px}.card-item-title{font-size:14px}.card-item-sub{font-size:12px}.card-item:hover{transform:none}.btn{padding:10px 16px;font-size:13px}.question-card{padding:12px}.question-header{flex-direction:column;gap:8px;align-items:flex-start}.form-input,.form-select,.form-textarea{font-size:16px;padding:12px 14px}.login-card{padding:28px 20px}.login-card h1{font-size:20px}.google-btn{font-size:14px;padding:12px 16px}.modal{width:95%;padding:20px;max-height:90vh}}